介绍一种高精度电子秤的数据采集系统，给出了系统的硬件电路和软件设计。分析了系统的工作原理；较详细地讨论了信号调理模块中的应变转换问题，给出了一种抗干扰能力强、并能消除称重时偏心影响的并联组秤方式；重点讨论了信号预放以及滤波电路设计中应该考虑的问题及其对策；最后讨论了系统的软硬件抗干扰设计。%The paper introduces a data sampling system of high precision electronic steelyard, and also presents the design of hardware and software work principles of the data sampling system, especially, the design of strain-transition, forward signal amplifier and filter. Finally, the paper gives an anti-interference design of the hardware and software.
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